| 1541 | Carte | HEL2.1 | Heliodor | In Paulum Alexandrinum Commentarium | da |
| 1542 | Carte | OLY1.1 | Olympiodoros | In Platonis Gorgias Commentarium | da |
| 1543 | Carte | ALT1.1 | Iacobus de Altavillia | In primum librum Sententiarum. Ms. Erfurt, Ampoloniana CA 2° 118 | da |
| 1544 | Carte | WEI1.16 | Weijers, Olga | In search of the truth. A history of disputation techniques from antiquity to early modern times | da |
| 1545 | Carte | TRA1.1 | Tramontana, Alessandra | In Sicilia a scuola con Persio. Le lezioni dell'umanista Tommaso Schifaldo | da |
| 1546 | Carte | FIS1.1 | Fishacre, Richard | In Tertium Librum Sententiarum Teil 2: Dist. 23-40 | da |
| 1547 | Carte | ADA3.1#2 | Adamson, Peter | In the age of al-Fārābī: Arabic philosophy in the fourth/tenth century | da |
| 1548 | Carte | ADA3.1 | Adamson, Peter | In the age of al-Fārābī: Arabic philosophy in the fourth/tenth century | nu |
| 1549 | Carte | MAR1.1 | Marek, Christian | In the Land of a Thousand Gods: A History of Asia Minor in the Ancient World | da |
| 1550 | Carte | MUS1.4 | Musca, Vasile | Incercare asupra gandirii romanesti | da |
| 1551 | Carte | ~C.23 | Lancranjan, Ioan | Incercari de reabilitare a gandirii crestine medievale. Studiu de sinteza | da |
| 1552 | Articol | X-aba1.1 | Abaelard, Peter; ed. Geyer, Bernhard | Incipiunt Glossae secundum magistrum Petrum Abaelardum super Porphyrium | da |
| 1553 | Articol | X-wer1.1 | Werner, Hans-Joachim | Incommunicabilitas et Libertas | da |
| 1554 | Carte | ARI1.53.1 | Hermann Bonitz | Index Aristotelicus, vol I | da |
| 1555 | Carte | ARI1.53.2 | Hermann Bonitz | Index Aristotelicus, vol II | da |
| 1556 | Carte | GIL1.1 | Gilson, Etienne | Index scolastico-cartesien | da |
| 1557 | Carte | THO1.4 | | Indices auctoritatum omnique rerum notabilium occurrentium in S.T et in S.C.G | da |
| 1558 | Articol | X-tat1.2 | Tătaru-Cazaban, Bogdan | Individualitate şi infinit la Nicolaus Cusanus | da |
| 1559 | Carte | BAR7.1 | Barber, Kenneth F.; Garcia, Jorge J. E. (eds.) | Individuation and Identity in Early Modern Philosophy, | da |
| 1560 | Carte | GRA2.3 | Gracia, Jorge J. E. (ed.) | Individuation in Later Scholasticism and Counter-Reformation. 1150-1650 | da |
| 1561 | Carte | GRA2.1 | Gracia, Jorge J. E. | Individuation in Scholasticism | da |
| 1562 | Carte | TAR2.1 | Tarlazzi, Caterina | Individui universali. Il realismo di Gualtiero di Mortagne nel XII secolo | da |
| 1563 | Carte | AER1.2.2 | Aertsen, Ian A. (ed.); et al. | Individuum und Individualitat im Mitteralter | da |
| 1564 | Carte | AER1.2.1 | Aertsen, Ian A. (ed.); et al. | Individuum und Individualitat im Mitteralter | da |
| 1565 | Articol | X-sor1.1 | Sorabji, Richard | Infinite power impressed: the transformation of Aristotle's physics and theology | da |
